一旦你开始认真地学习英语，你就会发现它并不太容易。

Once that you begin to study English carefully, you will find that it is not so easy.

youdao

一旦你开始认真地学习英语，你就会发现它并不太容易。

Once that you begin to study English carefully, you will find that it is not so easy.

youdao